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20130416
20130424
Search Results 0 to 2 of about 3 (some duplicates have been removed)
. homeland security correspondent bob orr is in washington following the investigation. >> reporter: law enforcement officials say the bombs contained an explosive similar to black powder. they were laced with bbs, ball bearings and nails. trauma surgeon said many of the injured have multiple shrapnel wounds. >> they are numerous, numerous. there are people who have 10, 20, 30, 40 of them in their body or more. >> reporter: investigators believe the bombs were hidden in black nylon backpacks. and housed inside sealable metal pots called pressure cookers. pressure cooker bombs can help boost the power of relatively small devices by briefly constraining the blast. and when the cookers do explode, they can add large chunks of metal to the shrapnel spray. the i.e.d.s have been popular with terrorists. al qaeda published a how-to recipe in an on-line magazine. several of the bombs were used in the 2006 attack on trains in mumbai india. in 2004 and 2010, the department of homeland security warned law enforcement that pressure cooker bombs could present a threat in the u.s. in the failed time s
Search Results 0 to 2 of about 3 (some duplicates have been removed)